Sneak Peek Image - Hollow Trunk - Walk-through example (Patreon)

For the hollow trunk you can do exact the same, which would be placing rocks and plants along both side of the "path", but as this looks a bit strange, I would recommend to use another mod made by me, which is the Invisible Fence.

In the first part of the image, you see how this looks after placing the fence/wall.
The second part is after all fences have been "recolored" to the second swatch, which makes them to become invisible.

You can then add some other plants or grasses just for decoration purposes.
All these things will be shown in the video too.